Fix coverity major defects

Fix coverity major defects

- list of fixed defects

|  6 | Major    | 1738991 | Undecided | AUTO_CAUSES_COPY | /home/abuild/rpmbuild/BUILD/nnfw-1.25.0/runtime/onert/core/src/dumper/dot/OperandNode.cc:38           | R |
|  7 | Major    | 1739127 | Undecided | AUTO_CAUSES_COPY | /home/abuild/rpmbuild/BUILD/nnfw-1.25.0/runtime/libs/benchmark/src/Result.cpp:164                     | R |
|  9 | Major    | 1740270 | Undecided | AUTO_CAUSES_COPY | /home/abuild/rpmbuild/BUILD/nnfw-1.25.0/runtime/onert/core/src/compiler/StaticShapeInferer.cc:806     | R |
| 11 | Major    | 1741349 | Undecided | AUTO_CAUSES_COPY | /home/abuild/rpmbuild/BUILD/nnfw-1.25.0/runtime/onert/backend/cpu/KernelGenerator.cc:632              | R |
| 12 | Major    | 1742302 | Undecided | AUTO_CAUSES_COPY | /home/abuild/rpmbuild/BUILD/nnfw-1.25.0/runtime/libs/benchmark/src/Result.cpp:160                     | R |
| 13 | Major    | 1742935 | Undecided | AUTO_CAUSES_COPY | /home/abuild/rpmbuild/BUILD/nnfw-1.25.0/compute/cker/include/cker/operation/Helper/MatmulBCast.h:66   | R |
| 14 | Major    | 1743063 | Undecided | AUTO_CAUSES_COPY | /home/abuild/rpmbuild/BUILD/nnfw-1.25.0/runtime/onert/backend/cpu/KernelGenerator.cc:310              | R |
| 17 | Major    | 1744612 | Undecided | AUTO_CAUSES_COPY | /home/abuild/rpmbuild/BUILD/nnfw-1.25.0/runtime/onert/backend/gpu_cl/KernelGenerator.cc:113           | R |
| 19 | Major    | 1745118 | Undecided | AUTO_CAUSES_COPY | /home/abuild/rpmbuild/BUILD/nnfw-1.25.0/runtime/onert/backend/gpu_cl/KernelGenerator.cc:517           | R |
| 23 | Major    | 1747394 | Undecided | AUTO_CAUSES_COPY | /home/abuild/rpmbuild/BUILD/nnfw-1.25.0/compute/cker/include/cker/operation/Helper/MatmulBCast.h:65   | R |
| 25 | Major    | 1748390 | Undecided | AUTO_CAUSES_COPY | /home/abuild/rpmbuild/BUILD/nnfw-1.25.0/runtime/libs/benchmark/src/Result.cpp:169                     | R |